diff options
Diffstat (limited to 'src/basic')
| -rw-r--r-- | src/basic/in-addr-util.c | 37 | ||||
| -rw-r--r-- | src/basic/in-addr-util.h | 6 |
2 files changed, 43 insertions, 0 deletions
diff --git a/src/basic/in-addr-util.c b/src/basic/in-addr-util.c index aa681b7bb7..641c5de7a3 100644 --- a/src/basic/in-addr-util.c +++ b/src/basic/in-addr-util.c @@ -350,6 +350,43 @@ int in_addr_random_prefix( return -EAFNOSUPPORT; } +int in_addr_prefix_range( + int family, + const union in_addr_union *in, + unsigned prefixlen, + union in_addr_union *ret_start, + union in_addr_union *ret_end) { + + union in_addr_union start, end; + int r; + + assert(in); + + if (!IN_SET(family, AF_INET, AF_INET6)) + return -EAFNOSUPPORT; + + if (ret_start) { + start = *in; + r = in_addr_prefix_nth(family, &start, prefixlen, 0); + if (r < 0) + return r; + } + + if (ret_end) { + end = *in; + r = in_addr_prefix_nth(family, &end, prefixlen, 1); + if (r < 0) + return r; + } + + if (ret_start) + *ret_start = start; + if (ret_end) + *ret_end = end; + + return 0; +} + int in_addr_to_string(int family, const union in_addr_union *u, char **ret) { _cleanup_free_ char *x = NULL; size_t l; diff --git a/src/basic/in-addr-util.h b/src/basic/in-addr-util.h index 24308b702e..a5ce8258fd 100644 --- a/src/basic/in-addr-util.h +++ b/src/basic/in-addr-util.h @@ -41,6 +41,12 @@ int in_addr_prefix_intersect(int family, const union in_addr_union *a, unsigned int in_addr_prefix_next(int family, union in_addr_union *u, unsigned prefixlen); int in_addr_prefix_nth(int family, union in_addr_union *u, unsigned prefixlen, uint64_t nth); int in_addr_random_prefix(int family, union in_addr_union *u, unsigned prefixlen_fixed_part, unsigned prefixlen); +int in_addr_prefix_range( + int family, + const union in_addr_union *in, + unsigned prefixlen, + union in_addr_union *ret_start, + union in_addr_union *ret_end); int in_addr_to_string(int family, const union in_addr_union *u, char **ret); int in_addr_prefix_to_string(int family, const union in_addr_union *u, unsigned prefixlen, char **ret); int in_addr_port_ifindex_name_to_string(int family, const union in_addr_union *u, uint16_t port, int ifindex, const char *server_name, char **ret); |